import java.awt.Component;
import javax.swing.*;

class OrderCellRenderer extends DefaultListCellRenderer {
    @Override
    public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
        Component component = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
        if (component instanceof JLabel && value instanceof Order) {
            JLabel label = (JLabel) component;
            Order order = (Order) value;
            label.setText(order.getProduct());
        }
        return component;
    }
}